Method fob treating brake and transmission bands



Reissued Feb. 20, 1923.

UNITED TEs WALTER K. BoILnAU, orI BALTIMORE, MARYLAND, AssIGNoR' 'ro PITTSBURGH o7 REFINI Gooi" ,'.iec ii uvrr0N, A CORPORATION or DELAWARE.

iuE'rimn-ron REA ING BRAKE AND TRANSMISSION nANns.

No Drawing. Original No. 1,418,695, dated June a, isazfse iai No. 555,388, filed April is, 1922. A ii cation for reissue filed January 13, 1923. Serial No. 612,556.

To all whom it may concern:

Be it known thatl, WALTER K.jBo LnAU, a citizen of the United States of America,

residing in the city of Baltimore, State of Maryland, have invented certain new and useful Improvements in Methods for Treator in a 'case which forms part of the fly wheel casing which is in turnopen to the ing Brake and Transmission Bands, of,

which the following is a specification.

This application is in part a continuation of my application No. 529,922, filed Januar 17th, 1922.

' i 'l his invention relates to a method of treating transmission and brake bands of automobiles of the type which have a planetary transmission either in a separate case crank case which latter description is in ac .cordance With the construction of certain' Well knowntypes'of light, cheap, well .known automobiles now inextensive use.

' With the cylinder oils now in use which are pure petroleum oils of requisite specific gravities, flash point and c'oldtest, the transmission bands become hard and brittle and acquirea glazed surface which causes them to alternately slip and grab giving the chattering and vibrating eflt'ect which is incident to the operation of most-automobiles having the planetary type of transmission, particularly on low gear, reverseand on application of the foot brake in which three operations the three transmission bands arebrought into play. This not onlycauses the operation of the brakes and gears to be variable and uncertain but greatly reduces the life of thebands. The invention relates to a method oftreating these bandsin-the ordinary operation of the car which keeps them soft and-pliable so that they do not slip and grip and chatter and the operation of the brakes and gears is more forcible and certain." Fur-,- ther by eliminating this difliculty the life of the transmission bands is almost immeasurablyextended as the wear to these bands is due almost entirely to the aforesaid alterparts therein.

- full efliciency as a motor lubricant my method is eifective with" anyl-endjall} a -'In the practice of the method which is the subject of bands with a petroleum oil having the physical properties required of an internal combustion engine cylinder oil with which 3 oil, as sperm oil or lard oil, or the like." A"

grease which can be' obtained in considerable quantities. and which the applicant has i found can be used to great advantage in this my invention I treat the brake connection is a'neutralized wool fat, i. e.,fthe 1 fat obtained in washing wool, the alkali be ing neutralized by th addition of an equivalent-amount of acid.

It has been'found by experiment that'an advantageous combination consists of from 2% or 3% to 10% or 12% of saponifiable grease or oil, with the remainder comprising petroleum oil having the necessary physical properties required of internal combustion engine cylinder oils. One combination which has proved to be particularly good consists of 5% saponifiable oil or grease, with the remaindericomprising a petroleum oil having the necessary physical properties required of internal combustion engine cylinder oils. The petroleum oils and the saponifiable oils or greases are solvents of each other and may be readily combined in any convenient manner- 1 In the practice of my method the transmission bands are bathed continually during the operation of the car in anoilcon- 1 taming saponifiable materialcombined as aforesaid, a bath composed of the mixed oil being for this purpose maintained in.the

transmission case which as aforesaid'j na'yi,

be a single compartment with the flywheel case and crank case or may be'separate.

- a As the oil aforementioned serves fw ith rangements of the planetary 'trans'missiom;

; the prime necessity beingan enclosing casefto hold the oil; When the bands are-thus 7 nate slipping and ggpping of thebands treated chattering is not only.. liminate ear and tear'on' the creased. Y

ioo

ing transmission bands in accordance-with Y my invention I would-have it understood i I that the specific terms herein' are used gd g scriptively rather than in a limiting sense, the scope of the invention being defined in the claims.

What I claim and desire to secure by Letters Patent is: y

1. The method of treating brake and transmission bands of textile fabric used I in connection with a planetary transmission to keep thebands soft and pliable which consists in maintaining in'the transmission casin a bath consisting of a petroleum oil of su stantially the consistency of internal combustion engine cylinder oil, combined with saponifiable material.

2. The method of treating brake and transmission bands of textile fabric. used in connection with a planetary transmission to keep the bands soft and pliable which connection with a planetary keep the bands soft and p i consists in maintaining in the transmission casing a bath consisting of a refined petroleum oil of the consistency used for internal combustion engine cylinder oil combined with 2 to 12 per cent saponifiable material.

3. The method of treating brake and transmission bands of textile fabric used in transmission to able which consists in maintaining in the transmission casing a bath consisting of a refined petroleum oil of the consistency used for internal combustion engine cylinder oil combined with 2 to 12 per cent Wool fat.

Signed by me at Baltimore in the city of Baltimore, this 10th da WALTE K. BOILEAU.

of January, 1923. 

